Make Scrollable's free scroll initial velocity matches that of iOS (#60501)

diff --git a/dev/benchmarks/microbenchmarks/README.md b/dev/benchmarks/microbenchmarks/README.md
index eda8bae..82f0ecb 100644
--- a/dev/benchmarks/microbenchmarks/README.md
+++ b/dev/benchmarks/microbenchmarks/README.md
@@ -5,7 +5,7 @@
 these:
 
 ```
-flutter run --release lib/gestures/velocity_tracker_data.dart
+flutter run --release lib/gestures/velocity_tracker_bench.dart
 flutter run --release lib/gestures/gesture_detector_bench.dart
 flutter run --release lib/stocks/animation_bench.dart
 flutter run --release lib/stocks/build_bench.dart